493 lines
12 KiB
C++
493 lines
12 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2003 Chris Schoeneman
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file COPYING that should have accompanied this file.
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*
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* This package is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "CArchTaskBarWindows.h"
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#include "CArchMiscWindows.h"
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#include "IArchTaskBarReceiver.h"
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#include "CArch.h"
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#include "XArch.h"
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#include <string.h>
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#include <shellapi.h>
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static const UINT kAddReceiver = WM_USER + 10;
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static const UINT kRemoveReceiver = WM_USER + 11;
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static const UINT kUpdateReceiver = WM_USER + 12;
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static const UINT kNotifyReceiver = WM_USER + 13;
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static const UINT kFirstReceiverID = WM_USER + 14;
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//
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// CArchTaskBarWindows
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//
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CArchTaskBarWindows* CArchTaskBarWindows::s_instance = NULL;
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HINSTANCE CArchTaskBarWindows::s_appInstance = NULL;
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CArchTaskBarWindows::CArchTaskBarWindows(void* appInstance) :
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m_nextID(kFirstReceiverID)
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{
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// save the singleton instance
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s_instance = this;
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// save app instance
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s_appInstance = reinterpret_cast<HINSTANCE>(appInstance);
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// we need a mutex
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m_mutex = ARCH->newMutex();
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// and a condition variable which uses the above mutex
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m_ready = false;
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m_condVar = ARCH->newCondVar();
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// we're going to want to get a result from the thread we're
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// about to create to know if it initialized successfully.
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// so we lock the condition variable.
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ARCH->lockMutex(m_mutex);
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// open a window and run an event loop in a separate thread.
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// this has to happen in a separate thread because if we
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// create a window on the current desktop with the current
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// thread then the current thread won't be able to switch
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// desktops if it needs to.
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m_thread = ARCH->newThread(&CArchTaskBarWindows::threadEntry, this);
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// wait for child thread
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while (!m_ready) {
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ARCH->waitCondVar(m_condVar, m_mutex, -1.0);
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}
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// ready
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ARCH->unlockMutex(m_mutex);
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}
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CArchTaskBarWindows::~CArchTaskBarWindows()
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{
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if (m_thread != NULL) {
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PostMessage(m_hwnd, WM_QUIT, 0, 0);
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ARCH->wait(m_thread, -1.0);
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ARCH->closeThread(m_thread);
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}
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ARCH->closeCondVar(m_condVar);
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ARCH->closeMutex(m_mutex);
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s_instance = NULL;
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}
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void
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CArchTaskBarWindows::addDialog(HWND hwnd)
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{
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CArchMiscWindows::addDialog(hwnd);
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}
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void
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CArchTaskBarWindows::removeDialog(HWND hwnd)
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{
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CArchMiscWindows::removeDialog(hwnd);
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}
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void
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CArchTaskBarWindows::addReceiver(IArchTaskBarReceiver* receiver)
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{
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// ignore bogus receiver
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if (receiver == NULL) {
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return;
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}
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// add receiver if necessary
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CReceiverToInfoMap::iterator index = m_receivers.find(receiver);
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if (index == m_receivers.end()) {
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// add it, creating a new message ID for it
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CReceiverInfo info;
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info.m_id = getNextID();
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index = m_receivers.insert(std::make_pair(receiver, info)).first;
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// add ID to receiver mapping
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m_idTable.insert(std::make_pair(info.m_id, index));
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}
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// add receiver
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PostMessage(m_hwnd, kAddReceiver, index->second.m_id, 0);
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}
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void
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CArchTaskBarWindows::removeReceiver(IArchTaskBarReceiver* receiver)
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{
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// find receiver
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CReceiverToInfoMap::iterator index = m_receivers.find(receiver);
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if (index == m_receivers.end()) {
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return;
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}
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// remove icon. wait for this to finish before returning.
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SendMessage(m_hwnd, kRemoveReceiver, index->second.m_id, 0);
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// recycle the ID
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recycleID(index->second.m_id);
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// discard
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m_idTable.erase(index->second.m_id);
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m_receivers.erase(index);
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}
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void
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CArchTaskBarWindows::updateReceiver(IArchTaskBarReceiver* receiver)
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{
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// find receiver
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CReceiverToInfoMap::const_iterator index = m_receivers.find(receiver);
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if (index == m_receivers.end()) {
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return;
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}
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// update icon and tool tip
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PostMessage(m_hwnd, kUpdateReceiver, index->second.m_id, 0);
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}
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UINT
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CArchTaskBarWindows::getNextID()
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{
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if (m_oldIDs.empty()) {
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return m_nextID++;
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}
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UINT id = m_oldIDs.back();
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m_oldIDs.pop_back();
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return id;
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}
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void
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CArchTaskBarWindows::recycleID(UINT id)
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{
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m_oldIDs.push_back(id);
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}
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void
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CArchTaskBarWindows::addIcon(UINT id)
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{
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ARCH->lockMutex(m_mutex);
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CIDToReceiverMap::const_iterator index = m_idTable.find(id);
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if (index != m_idTable.end()) {
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modifyIconNoLock(index->second, NIM_ADD);
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}
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ARCH->unlockMutex(m_mutex);
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}
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void
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CArchTaskBarWindows::removeIcon(UINT id)
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{
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ARCH->lockMutex(m_mutex);
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removeIconNoLock(id);
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ARCH->unlockMutex(m_mutex);
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}
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void
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CArchTaskBarWindows::updateIcon(UINT id)
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{
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ARCH->lockMutex(m_mutex);
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CIDToReceiverMap::const_iterator index = m_idTable.find(id);
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if (index != m_idTable.end()) {
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modifyIconNoLock(index->second, NIM_MODIFY);
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}
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ARCH->unlockMutex(m_mutex);
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}
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void
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CArchTaskBarWindows::addAllIcons()
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{
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ARCH->lockMutex(m_mutex);
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for (CReceiverToInfoMap::const_iterator index = m_receivers.begin();
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index != m_receivers.end(); ++index) {
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modifyIconNoLock(index, NIM_ADD);
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}
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ARCH->unlockMutex(m_mutex);
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}
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void
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CArchTaskBarWindows::removeAllIcons()
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{
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ARCH->lockMutex(m_mutex);
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for (CReceiverToInfoMap::const_iterator index = m_receivers.begin();
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index != m_receivers.end(); ++index) {
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removeIconNoLock(index->second.m_id);
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}
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ARCH->unlockMutex(m_mutex);
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}
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void
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CArchTaskBarWindows::modifyIconNoLock(
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CReceiverToInfoMap::const_iterator index, DWORD taskBarMessage)
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{
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// get receiver
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UINT id = index->second.m_id;
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IArchTaskBarReceiver* receiver = index->first;
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// lock receiver so icon and tool tip are guaranteed to be consistent
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receiver->lock();
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// get icon data
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HICON icon = reinterpret_cast<HICON>(
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const_cast<IArchTaskBarReceiver::Icon>(receiver->getIcon()));
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// get tool tip
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std::string toolTip = receiver->getToolTip();
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// done querying
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receiver->unlock();
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// prepare to add icon
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NOTIFYICONDATA data;
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data.cbSize = sizeof(NOTIFYICONDATA);
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data.hWnd = m_hwnd;
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data.uID = id;
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data.uFlags = NIF_MESSAGE;
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data.uCallbackMessage = kNotifyReceiver;
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data.hIcon = icon;
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if (icon != NULL) {
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data.uFlags |= NIF_ICON;
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}
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if (!toolTip.empty()) {
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strncpy(data.szTip, toolTip.c_str(), sizeof(data.szTip));
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data.szTip[sizeof(data.szTip) - 1] = '\0';
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data.uFlags |= NIF_TIP;
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}
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else {
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data.szTip[0] = '\0';
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}
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// add icon
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if (Shell_NotifyIcon(taskBarMessage, &data) == 0) {
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// failed
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}
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}
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void
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CArchTaskBarWindows::removeIconNoLock(UINT id)
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{
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NOTIFYICONDATA data;
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data.cbSize = sizeof(NOTIFYICONDATA);
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data.hWnd = m_hwnd;
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data.uID = id;
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if (Shell_NotifyIcon(NIM_DELETE, &data) == 0) {
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// failed
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}
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}
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void
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CArchTaskBarWindows::handleIconMessage(
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IArchTaskBarReceiver* receiver, LPARAM lParam)
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{
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// process message
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switch (lParam) {
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case WM_LBUTTONDOWN:
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receiver->showStatus();
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break;
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case WM_LBUTTONDBLCLK:
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receiver->primaryAction();
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break;
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case WM_RBUTTONUP: {
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POINT p;
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GetCursorPos(&p);
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receiver->runMenu(p.x, p.y);
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break;
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}
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case WM_MOUSEMOVE:
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// currently unused
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break;
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default:
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// unused
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break;
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}
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}
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bool
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CArchTaskBarWindows::processDialogs(MSG* msg)
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{
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// only one thread can be in this method on any particular object
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// at any given time. that's not a problem since only our event
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// loop calls this method and there's just one of those.
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ARCH->lockMutex(m_mutex);
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// remove removed dialogs
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m_dialogs.erase(false);
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// merge added dialogs into the dialog list
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for (CDialogs::const_iterator index = m_addedDialogs.begin();
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index != m_addedDialogs.end(); ++index) {
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m_dialogs.insert(std::make_pair(index->first, index->second));
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}
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m_addedDialogs.clear();
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ARCH->unlockMutex(m_mutex);
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// check message against all dialogs until one handles it.
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// note that we don't hold a lock while checking because
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// the message is processed and may make calls to this
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// object. that's okay because addDialog() and
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// removeDialog() don't change the map itself (just the
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// values of some elements).
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ARCH->lockMutex(m_mutex);
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for (CDialogs::const_iterator index = m_dialogs.begin();
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index != m_dialogs.end(); ++index) {
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if (index->second) {
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ARCH->unlockMutex(m_mutex);
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if (IsDialogMessage(index->first, msg)) {
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return true;
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}
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ARCH->lockMutex(m_mutex);
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}
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}
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ARCH->unlockMutex(m_mutex);
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return false;
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}
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LRESULT
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CArchTaskBarWindows::wndProc(HWND hwnd,
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UINT msg, WPARAM wParam, LPARAM lParam)
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{
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switch (msg) {
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case kNotifyReceiver: {
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// lookup receiver
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CIDToReceiverMap::const_iterator index = m_idTable.find(wParam);
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if (index != m_idTable.end()) {
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IArchTaskBarReceiver* receiver = index->second->first;
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handleIconMessage(receiver, lParam);
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return 0;
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}
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break;
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}
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case kAddReceiver:
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addIcon(wParam);
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break;
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case kRemoveReceiver:
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removeIcon(wParam);
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break;
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case kUpdateReceiver:
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updateIcon(wParam);
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break;
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default:
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if (msg == m_taskBarRestart) {
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// task bar was recreated so re-add our icons
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addAllIcons();
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}
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break;
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}
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return DefWindowProc(hwnd, msg, wParam, lParam);
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}
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LRESULT CALLBACK
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CArchTaskBarWindows::staticWndProc(HWND hwnd, UINT msg,
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WPARAM wParam, LPARAM lParam)
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{
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// if msg is WM_NCCREATE, extract the CArchTaskBarWindows* and put
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// it in the extra window data then forward the call.
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CArchTaskBarWindows* self = NULL;
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if (msg == WM_NCCREATE) {
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CREATESTRUCT* createInfo;
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createInfo = reinterpret_cast<CREATESTRUCT*>(lParam);
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self = reinterpret_cast<CArchTaskBarWindows*>(
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createInfo->lpCreateParams);
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SetWindowLong(hwnd, 0, reinterpret_cast<LONG>(self));
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}
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else {
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// get the extra window data and forward the call
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LONG data = GetWindowLong(hwnd, 0);
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if (data != 0) {
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self = reinterpret_cast<CArchTaskBarWindows*>(
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reinterpret_cast<void*>(data));
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}
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}
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// forward the message
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if (self != NULL) {
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return self->wndProc(hwnd, msg, wParam, lParam);
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}
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else {
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return DefWindowProc(hwnd, msg, wParam, lParam);
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}
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}
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void
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CArchTaskBarWindows::threadMainLoop()
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{
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// register the task bar restart message
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m_taskBarRestart = RegisterWindowMessage(TEXT("TaskbarCreated"));
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// register a window class
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WNDCLASSEX classInfo;
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classInfo.cbSize = sizeof(classInfo);
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classInfo.style = CS_NOCLOSE;
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classInfo.lpfnWndProc = &CArchTaskBarWindows::staticWndProc;
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classInfo.cbClsExtra = 0;
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classInfo.cbWndExtra = sizeof(CArchTaskBarWindows*);
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classInfo.hInstance = s_appInstance;
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classInfo.hIcon = NULL;
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classInfo.hCursor = NULL;
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classInfo.hbrBackground = NULL;
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classInfo.lpszMenuName = NULL;
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classInfo.lpszClassName = TEXT("SynergyTaskBar");
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classInfo.hIconSm = NULL;
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ATOM windowClass = RegisterClassEx(&classInfo);
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// create window
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m_hwnd = CreateWindowEx(WS_EX_TOOLWINDOW,
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reinterpret_cast<LPCTSTR>(windowClass),
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TEXT("Synergy Task Bar"),
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WS_POPUP,
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0, 0, 1, 1,
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NULL,
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NULL,
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s_appInstance,
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reinterpret_cast<void*>(this));
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// signal ready
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ARCH->lockMutex(m_mutex);
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m_ready = true;
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ARCH->broadcastCondVar(m_condVar);
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ARCH->unlockMutex(m_mutex);
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// handle failure
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if (m_hwnd == NULL) {
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UnregisterClass(reinterpret_cast<LPCTSTR>(windowClass), s_appInstance);
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return;
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}
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// main loop
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MSG msg;
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while (GetMessage(&msg, NULL, 0, 0)) {
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if (!processDialogs(&msg)) {
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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}
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// clean up
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removeAllIcons();
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DestroyWindow(m_hwnd);
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UnregisterClass(reinterpret_cast<LPCTSTR>(windowClass), s_appInstance);
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}
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void*
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CArchTaskBarWindows::threadEntry(void* self)
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{
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reinterpret_cast<CArchTaskBarWindows*>(self)->threadMainLoop();
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return NULL;
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}
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